Rock Identifier

Category

Synthetic (Man Made Glass)

Browse synthetic (man made glass) specimens identified by the Rock Identifier community.

Learn about Synthetic (Man Made Glass) in the encyclopedia

Opalite

Goldstone

Zincite

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Blue Goldstone

Sideromelane

Lead Feldspar

Black Obsidian

Maskelynite

Obsidian

Tachylite

Map Jasper

Tektite (Indochinite) (Tektite - High-silica amorphous glass (SiO2 + Al2O3)) — mineraloid

Tektite (Indochinite)

Tektite - High-silica amorphous glass (SiO2 + Al2O3)

Red Quartzite (Quartzite (SiO2)) — metamorphic

Red Quartzite

Quartzite (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Milky quartz with iron-stained matrix (Quartz (silicon dioxide, SiO₂)) — mineral

Milky quartz with iron-stained matrix

Quartz (silicon dioxide, SiO₂)

Quartz Pebbles (Silicon Dioxide (SiO2)) — mineral

Quartz Pebbles

Silicon Dioxide (SiO2)

Sandstone (Quartzite-rich) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Quartzite-rich)

Clastic sedimentary rock (primarily SiO2)

Pumice (Pumice (a vesicular volcanic glass)) — igneous

Pumice

Pumice (a vesicular volcanic glass)

Pumice (Pumice (Amorphous volcanic glass)) — igneous

Pumice

Pumice (Amorphous volcanic glass)

Pumice (Pumiceous rhyolite / Volcanic glass) — igneous

Pumice

Pumiceous rhyolite / Volcanic glass

Pumice (Pumice (Vesicular volcanic glass)) — igneous

Pumice

Pumice (Vesicular volcanic glass)

Quartz Pebble (Crystalline Silica (SiO2)) — mineral

Quartz Pebble

Crystalline Silica (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Polished brown stone, likely smoky quartz or jasper (Tentatively quartz (SiO₂), possibly smoky quartz; exact identification requires testing) — mineral

Polished brown stone, likely smoky quartz or jasper

Tentatively quartz (SiO₂), possibly smoky quartz; exact identification requires testing

Likely weathered quartz-bearing rock fragment (Indeterminate; appears to contain quartz (SiO₂) with iron-oxide staining, possibly from quartzite, granite, or pegmatite) — mineral

Likely weathered quartz-bearing rock fragment

Indeterminate; appears to contain quartz (SiO₂) with iron-oxide staining, possibly from quartzite, granite, or pegmatite

Tektite (Indochinite) (Tektite (Terrestrial Impact Glass)) — meteorite

Tektite (Indochinite)

Tektite (Terrestrial Impact Glass)

Milky quartz (likely quartzite or massive quartz) (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz (likely quartzite or massive quartz)

Quartz, silicon dioxide (SiO₂)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Grey Quartz (likely Smoky Quartz or Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

Grey Quartz (likely Smoky Quartz or Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (Small Grains) (Silicon Dioxide (SiO2)) — mineral

Quartz (Small Grains)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Dyed Quartz Crystals (Silicon Dioxide (SiO2) with artificial pigment) — mineral

Dyed Quartz Crystals

Silicon Dioxide (SiO2) with artificial pigment

Chert (specifically Flint or Common Chert) (Chert (Cryptocrystalline Silica, SiO2)) — sedimentary

Chert (specifically Flint or Common Chert)

Chert (Cryptocrystalline Silica, SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Smoky variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Smoky variety)

Silicon Dioxide (SiO2)

Likely tumbled quartz/chalcedony (Quartz (SiO₂), possibly milky quartz or pale chalcedony) — mineral

Likely tumbled quartz/chalcedony

Quartz (SiO₂), possibly milky quartz or pale chalcedony

Sandstone or Limestone (Arenite or Calcareous Sedimentary Rock) — Sedimentary

Sandstone or Limestone

Arenite or Calcareous Sedimentary Rock

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Pumice (Pumice (volcanic glass foam)) — igneous

Pumice

Pumice (volcanic glass foam)

Pumice (Volcanic glass / Pumiceous rock) — igneous

Pumice

Volcanic glass / Pumiceous rock

Pumice (Pumice (Vesicular volcanic glass)) — igneous

Pumice

Pumice (Vesicular volcanic glass)

Pumice (Pumice (Vesicular volcanic glass)) — igneous

Pumice

Pumice (Vesicular volcanic glass)

Quartzite Pebble (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (River Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Quartz pebble (Silicon dioxide (SiO2)) — sedimentary

Quartz pebble

Silicon dioxide (SiO2)

Obsidian (Volcanic Glass (Amorphous silicon dioxide with trace impurities)) — igneous

Obsidian

Volcanic Glass (Amorphous silicon dioxide with trace impurities)

Rose Quartz (Quartz (Silicon Dioxide, SiO2) with trace inclusions of dumortierite) — mineral

Rose Quartz

Quartz (Silicon Dioxide, SiO2) with trace inclusions of dumortierite

Tumbled milky quartz (Quartz (silicon dioxide, SiO₂)) — mineral

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Tumbled banded calcite (often sold as “onyx” or green onyx) (Calcite, CaCO₃; commonly banded cave/travertine calcite) — mineral

Tumbled banded calcite (often sold as “onyx” or green onyx)

Calcite, CaCO₃; commonly banded cave/travertine calcite

Orange Quartzite (Tumble-polished) (Quartzite (primarily SiO2)) — metamorphic

Orange Quartzite (Tumble-polished)

Quartzite (primarily SiO2)